Christian bostad



-O. BOSTAD. FOLDING BED JOINT.

No. 520,751. I Patented May 29, 1894 l COMPANY- UNITED ST TES PATENT OFFICE.

CHRISTIAN BOSTAD, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE AUTOMATIC FOLDING' BED COMPANY, SAME PLACE.

FOLDING-BED JOINT.

, SPECIFICATION forming part or Letters Patent No. 520,751, dated May 29, 1894. Application filed February 1, 1894:. Serial No. 498,730. (No model.)

To etZZ whom it may cancer-n.-

3e it known that I, CHRISTIAN BOSTAD, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Folding-Bed Joints; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

My invention relates to the joint uniting the bed to the case or standard.

Its objects are to secure a proper balance of the bed by shifting the pivotal point to ward the foot as the bed descends; to reduce thefriction to the minimum; to prevent the main parts of the bed from separating in moving; to guard against accident due to the spreading of the sides of the case; and to provide for easy access to the joint.

The invention consists of a smooth faced, flanged rocker secured to the bed rail and runn ng upon a level track secured to the case,1n connection with a link pivoted at one end to the bed rail and at the other to the case, and a door in the Wall of the case where by the joint is easily uncovered.

In the drawings, Figure 1, is a side elevation of the joint and a portion of the bed. Fig. 2, 1s a vertical transverse section on the line 2 2 of Fig. 1. Fig. 3, is a detail in perspectlve of a portion of the case and bed. Flg. 4, 1s a transverse section of the rocker.

The bed case, or standard, and the bed presentlug no novel features except as to the means for providing ready access to the joint, I have shown only such parts thereof as are necessary to reveal the invention. A portion of the standard is shown at A, and of the bed rail at B. A rocker, O, of metal is secured to the bed-rail by the bolts, 0. The face, or tread, of the rocker is smooth and is in the form of a true are of a circle. A level metal track, D, is secured by means of the'screws, to a block, F, attached to the inner wall of the standard so as to offset from the wall, and upon this track the rocker rides. The rocker is pivoted at its outer edge with a radial flange, 0, like a car wheel. This flange, 0, extends downwardly .below the surface of the track D, at its outer side, that is between the track and the wall of the standard, A. The joints upon opposite sides of the bed being of the same form the flanges, o, prevent the tracks, D, from spreading should the walls of the standard become warped, or distended in any other way, and all danger of the bed falling by reason of the rocker leaving the track is obviated. The rocker is set with its inner, or rearward, end adjacent to the lower edge of the bed-rail, B, and extends upwardly and forward, or toward the foot of I the bed, at an angle, approximately, of forty-five degrees, with reference to thelongitudinal direction of the bed-frame. Folding beds are provided with counter weights at their inner or headends. As the bed descends the center of gravity of the outer end recedes from the perpendicularvmore rapidly than that of the inner end so that to secure a proper balance through the entire movement it is necessary to have the fulcrum mov- I able so as to lengthen the leverage of the inner end as the bed approaches the horizontal. This object is attained by the use of such a rocker joint. The track piece, D, being offset a recess is formed between its tread portion and the wall of the standard to accommodate the rocker flange and also a rigid link, E, which is pivotally secured at one end to the track piece within this recess as shown at, e; and near the inner end of the track, its other end being p'ivotally secured to the outer end of the rocker as shown at, e. The pivotal adjustment of the link is such that it travels through the same angle as the rocker, thereby admitting of its attachment to the standard and bed-frame being positive. The functions of the link are to prevent the rocker from sliding upon the track; to prevent the bed from being changed in its angular relation to the standard, and to prevent the bed and the standard from being separated in moving. The bed and standard are, nevertheless, easily separable by the removal of the screws, e. It is, of course, necessary that the joint be covered from view. To provide access to it for the purpose above mentioned the standard, A, is provided with a door in the form of a slide, Cb, carried by vertical E, pivotally attached to the standard and to Ways. the bed-rail and adapted to swing through I claim as my invention the same angle as the rocker, substantially The combination with a folding bed and its as described and for the purpose specified. 5 standard of a level track, D, secured to the In testimony whereof I affix my signature in IS inner side of the standard and oifset from it; presence of two witnesses.

a curved rocker secured to the side of the CHRISTIAN BOSTAD. bed so as to ride upon the track and having Witnesses: a radial flange at its outer edge adapted to LOUIS K. GILLSON,

1o depend below the top of the track, and alink, M. H. L. WING. 

